I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
clavus claves cleaves calves clevis cloves clivias cloughs glaives calfs clefs califs cliffs gloves caliphs
clavus lavas laves lavs leaves loaves fulvous claves cleaves nilghaus nylghaus pahlavis slaves sleaves deleaves
clave clavi calve cleave clivia clove sclaff